The book format is PDF. You can use the Adobe Reader or equivalent to read the book. The book can be viewed on a PC, laptop and tablets (Android, IOS).
This is a first publication from Lightscaper Books, and more will be coming out in the future. The free book will be giving you a taste of what the future books will hold. There is no hassle to download. You don't need to register or subscribe to anything. Just press the link on this page's top right and you will be taken to the download page. And just press download there. Enjoy...